Detection Condition

PCM compares actual input signal from Mass Airflow/Intake Air Temperature (MAF/IAT) sensor with expected input signal from MAF/IAT sensor which PCM calculates by input voltage from Throttle Position (TP) sensor or engine speed.

• If mass intake airflow amount is less than 0.66 lb/min. (5.0 grams/sec.) for 5 seconds and throttle opening angle is more than 50 percent with engine running, PCM determines that detected mass intake air flow amount is too low.
• If mass intake air flow amount is more than 12.7 lb/min. (96 grams/sec.) for 5 seconds and engine speed is less than 2000 RPM with engine running, PCM determines that detected mass intake airflow amount is too high.

This is a Continuous Monitor (CM). MIL illuminates if PCM detects malfunction condition in two consecutive drive cycles or in one drive cycle while DTC for same malfunction has been stored in PCM. PENDING CODE is available if PCM detects malfunction condition during first drive cycle. FREEZE FRAME DATA is available. DTC is stored in PCM memory.